The most influential weights on the index included Suncor
Energy Inc, which fell 1.2 percent to C$37.35, and
Canadian Natural Resources, which declined 1.6 percent
to C$31.82.

U.S. crude prices were down 2.0 percent to $41.02 a
barrel, while Brent crude lost 1.9 percent to $43.58, as
U.S. inventories rose and investors discounted the possibility
of OPEC cutting output at its meeting this week.